The reason some including me are a bit suspiciuos of the ISM is that this movement calls itself 'international' but is actually Palestinian-led.

This statement implies that all Palestinian-led organizations, and all Palestinians, are terrorists, and are not to be trusted. That, just by virtue of being Palestinians, they automatically have no credibility. How do you think that sort of attitude would be recieved if it was directed at Jews? There are certainly Jewish led terrorist organizations, and organizations that have an agenda that is antithetical to human rights, including a sigificant faction whithin the Israeli government.

Should we determine that no Jewish-led organizations should be trusted because some of them have bad agendas? I don't think so. So it seems like a pretty vicious double standard to automatically discount anything that is led by Palestinians for no reason other than that they are Palestinians.